<template>
  <div class=''>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="6">
        <!-- 搜索功能 -->
        <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
          <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
        </el-input>
        </el-col>
        <el-col :span="4">
          <el-button @click="goAddPage" type="primary">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table表格区 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <template v-slot="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作"  width="120px">
          <template v-slot="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>    
            <el-button @click="removeById(scope.row.goods_id)" type="danger" icon="el-icon-delete" size="mini"></el-button>    
          </template>  
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="queryInfo.pagenum"
          :page-sizes="[5, 10, 15, 20]"
          :page-size="queryInfo.pagesize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total"
          background>
        </el-pagination>

    </el-card>
  </div>
</template>
<script>
export default {
  data(){
    return {
      // 查询商品列表的数据参数---每一个参数改变都可以请求到不同的数据
      queryInfo:{
        // query是查询的参数, 没有默认查询全部数据  
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品数据列表
      goodslist: [],
      // 总数据条数
      total: 0
    }
  },
  created() {  
    this.getGoodsList()  
  },
  methods: {
    // 根据参数获取商品列表数据
    async getGoodsList() {
      const {data: res} = await this.$axios.get('goods', {
        params: this.queryInfo  
      })
      if(res.meta.status !== 200) {
        return this.$message.error('获取数据失败')
      }
      // 获取成功赋值
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 一页显示多少条数据改变时函数
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    //  第几页
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()        
    },
    // 删除商品
    async removeById(id) {
      const confirmRes = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmRes !== 'confirm'){
        return this.$message.info('已取消删除')  
      }

      // 点击确认删除
      const {data: res} = await this.$axios.delete('goods/'+id)
      if(res.meta.status !== 200){
        return this.$message.erroe('删除失败')  
      }
      this.$message.success('删除成功')
      this.getGoodsList()
    },
    // 跳转到添加商品页面
    goAddPage() {
      this.$router.push('/goods/add')  
    }
  }
}
</script>
<style lang='less' scoped>

</style>
